Great question, future whiskey connoisseur! Yes, a little air can help soften harsh, young spirits. That’s why some folks let a fresh pour sit for 10 minutes. But a decanted bottle of whiskey isn’t a wine. Wine is a fragile flower; whiskey is a tough, kick-you-in-the-teeth cowboy.
Whiskey has already spent years breathing in a barrel. It doesn’t need its entire life savings of flavor to be exposed to oxygen in a crystal sphere. Too much air is the enemy of good whiskey. It turns boldness into blandness.
Pro Tips to Keep Your Decanter Happy
First, use a decanter with a glass stopper that fits snugly. A loose cork or a stopper that wobbles? That’s a backdoor for oxygen. Your whiskey will taste tired in weeks.
Second, don’t fill it to the very top. Leave a little space so you don’t slosh whiskey everywhere when you pour, but not so much that a lake of air sits on top. About an inch below the neck is perfect.
Third, and this is the pro move: Only decant whiskey you plan to finish within a few months. Save your expensive, dusty 25-year-old single malt for the bottle. Put the affordable, everyday sipper in the decanter.
How Long Can Whiskey Stay in a Decanter? (Pro Tips) | DineWithDrinks
Oh, and for the love of all that is holy, rinse and dry your decanter between bottles. Old, dried whiskey residue can turn funky and ruin your next pour. (It’s not dangerous, but it tastes like a sad old kitchen sponge.)